﻿2IO FIELD AND FOREST. 



153. Otus brachyotus (Gmel.) Short-eared Owl. a, adult. [Apparently the typ- 

 ical form, and evidently different from the usual American style.] 



154. Otus brachyotus, /3. cassini, Brewer. American Short-eared Owl. a, 1>, adults. 



155. Otus wilsonianus, Less. American Long-eared Owl. a, b, adults; c, d, pul : 

 lus. 



156. Scops asio, £. maxwellias, Ridgway. Mrs. Maxwell's Owl. a, $ ad. ; b, 

 9 ad. ; c, d, pullus. [See description at end of catalogue.] 



157. Scops flammeola, (Licht.) Flammulated Owl. a, adult. [Boulder, Col., 

 March. Iris umber brown /] 



158. Nyctale acadica, (Gm.) Saw-whet Owl. a, adult ; b, c, juv. 



159. Glaucidium gnoma, (Wagl.) Pigmy Owl. a, $ ad.; b, ^ ac l- 



160. Speotyto cunicularia, \. hypogaea, (Bonap.) North American Burrowing Owl. 



a, dJ 1 ad. ; b, <j> a d. ; c, d, pullus. 



Famliy . FALCONID^E: Falcons, 

 Kites, Hawks and Eagles. 



161. Falco saker, \. polyagrus, Cass. Prairie Falcon, a, " C} " ad.; b, "(^" juv. 

 (2nd yr.); c, "^" juv. (2nd yr. ) 



162. Falco richirdsoni; Ridgway. Richardson's Merlin, a, ^ (? a d.) 



163. Falco sparverius, Linn. American Kestril. a, ^ ad. ; b, Q juv. 



164. Pandion halisetus, 13. carolinensis, (Gm.) Americ in Osprey. a, b, juv. 



165. Circus hudsonius, (Linn.) Marsh Hawk, a, ^ ad. ; b, 9 j uv - 



166. Nisus cooperi, (Bonap.) Cooper's Hawk, a, cj iuv. ; b, ^ juv. 



167. Nisus fuscus, (Gm.) Sharp Shinned Plawk. a, $ juv. ; b, ^ juv. 



168. Astur atricapillus, (Wils.) American Gos-hawk. a, $ ad. ; b, ^ ad. ; c, juv. ; 

 d, e, pullus. 



169. Buteo borealis, /j. calurus, Cass. Western Red-tailed Buzzard, a, b, ad. ; c, 

 d, juv. 



170. Buteo swainsoni, Bonap. Swainson's Buzzard, a, ^ ad.; b, ^ a d. ; c, 9 j uv - 



171. Archibuteo lagopus, f3. sancti-johannis, (Gmel.) American Rough-legged Buz- 

 zard, a, ad. ; b, c, juv. 



172. Archibuteo ferru.^ineu-;, (Licht.) Ferruginous Ron jh-legged Buzzard; "Cali- 

 fornia Squirrel Hawk." a, ^ ad. ; melanistic [see description, on page 212.]; b, 



9 ad. ; c, d, pullus. 



173. Aquila chryssetos, j3. canidensis, (Linn.) American Golden Eagle, a, ad. ; 



b, juv., in 2nd or 3rd year; c, juv. in 1st year. 



174. Halisetus leucocephalus, (Linn.) Bald Eagle, a, ad. 



Family CATHARTID^E : American Vultures. 



175- Rhinogryphus aura, (Linn.) Turkey Vulture, a. ad. 



Family LARID^E : Jaegers, Gulls, and Terns. 



176. Stercorarius parasiticus, (Brunn.) Parasitic Jaeger, a, juv. [Boulder; De- 

 cember.] 



177. Rissa tridactyla, (Linn.) Kittiwake Gull., winter pi. [Boulder; December.] 



178. Xema sabinii, (Prev. et Des Murs.) Sabine's Gull, a, juv. [Boulder; De- 

 cember.] 



179. Chrcecocephalus Philadelphia, (Ord.) Bonaparte's Gull, a, juv., transition 

 pi. 



180. Larus delawarensis, (Ord.) Ring billed Gull, a, adult ; b, juv., transition pi. ; 



c, juv., first yr. 



